<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="box"></div>
</body>
<script src="../js/react.development.js"></script>
<script src="../js/react-dom.development.js"></script>
<script src="../js/babel.min.js"></script>
<script type="text/babel">
    function MyComponent() {
        return (
            <h1>this is my component</h1>
        )
    }

    let app = (
        <div>
            <MyComponent></MyComponent>
        </div>
    )

    ReactDOM.render( app, document.getElementById('box') );

</script>
</html>